<div>
    <p>contact works!</p>
    <ul>
      <li><a routerLink="/contact/mailing">Mailing</a></li>
      <li><a routerLink="/contact/mapping">Mapping</a></li>
      <li><a routerLink="/contact/website">Website</a></li>
    </ul>
    <h4>Child Routes Result</h4>
    <router-outlet></router-outlet>
  </div>